CN103394690B - A kind of cemented carbide powder producing nozzle and preparation method thereof - Google Patents
A kind of cemented carbide powder producing nozzle and preparation method thereof Download PDFInfo
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- CN103394690B CN103394690B CN201310351218.7A CN201310351218A CN103394690B CN 103394690 B CN103394690 B CN 103394690B CN 201310351218 A CN201310351218 A CN 201310351218A CN 103394690 B CN103394690 B CN 103394690B
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Abstract
The invention discloses a kind of cemented carbide powder producing nozzle and preparation method thereof, alloyed powder is made up of following raw material: WC, Ni, TiC, Co, Cr
2c
3and TaC; The method preparing alloyed powder comprises: S1. takes raw material for standby respectively; S2. adding in ball mill by the raw material taken in step S1, is that abrasive media carries out ball milling with alcohol; S3. the powder steam drying machine after ball milling is dried, after oven dry, add adhesive buna; S4. the powder adding adhesive buna in step S3 is dried again, sieve after oven dry, obtained cemented carbide powder.The present invention effectively alleviates the shortage of world's cobalt and tungsten resource, decrease carbide alloy in use cobalt be likely oxidized to the virose Co of tool
6+to the threat of health; The alloy nozzle of alloyed powder manufacture of the present invention is compared than the alloy nozzle of conventional sintering explained hereafter, has light specific gravity, hardness is large, cost is low, the characteristic of safety and environmental protection, and bending strength conforms to quality requirements.
Description
Technical field
The invention belongs to metal alloy field, be specifically related to a kind of cemented carbide powder producing nozzle and preparation method thereof.
Background technology
The fast development of modern industry needs various injection apparatus.The spray for dust suppression of the various cleaning equipment of mechanical industry, bargh, the manufacturing various paint line such as misting cooling, motorcycle, bicycle, refrigerator, washing machine of metallurgy industry, beautify the sandblasting of various object surface, spraying water with high pressure etc. needs nozzle all in a large number, and the nozzle not only processing difficulties in the past adopting the materials such as high-speed steel to make, and material hardness is low, abrasion resistance is poor, cause jetting stability and uniformity poor, service life is short, and jeting effect is poor and cost is high.
Carbide alloy is the class composite be made up through powder metallurgy process of refractory metal hard compounds (hard phase) and metal adhesive (Binder Phase).With tungsten carbide base carbide alloy material, primarily of matrix tungsten carbide and Binder Phase cobalt composition, tungsten-cobalt carbide series hard metal develops in carbide alloy the earliest and a kind of carbide alloy the most ripe.Up to the present, tungsten-cobalt carbide series hard metal remains the topmost part in carbide alloy field, and therefore, the research of tungsten-cobalt carbide series hard metal has important impact to whole hard carbide industry.Cobalt owing to having good wettability to carbide, and has stronger intensity with the alloy that carbide forms, and since carbide alloy comes out, has been widely used as the binding metal of carbide alloy always.But because world's cobalt resource is very limited, in addition, carbide alloy in use cobalt is likely oxidized to the virose Co of tool
6+, cause potential threat to health, the alternative materials therefore finding and study cobalt is exactly always an important topic during carbide alloy is studied and produced; Though China is tungsten lay in more country, but since carbide alloy invention, it is main raw material(s) with tungsten carbide always, face the worsening shortages of tungsten resource, and though other materials or part replace tungsten carbide and play great function to alleviating the shortage of resource, use as the substitute of tungsten carbide, the materials such as other metal carbides exist that carbide alloy property indices declines at present, alloy substrate non-oxidizability and the problems such as corrosion stability is poor, production cost is high.
Chinese patent CN102328074A discloses a kind of carboloy nozzle and preparation method thereof, carboloy nozzle comprises cemented carbide powder, binding agent, and binding agent comprises medical paraffin 10% ~ 17%, ceresine 15% ~ 21%, high density polyethylene (HDPE) 30% ~ 55%, EVA resin 20% ~ 32%; The method of producing carboloy nozzle is after being mixed with binding agent by cemented carbide powder, repeatedly mixing, be placed in injection (mo(u)lding) machine again and obtain blank, put into that three polyethylene dissolve, degreasing, finally enter in vacuum drying oven and sinter finished product into, though to have abrasion resistance strong for nozzle of producing of this invention, stability and the uniformity of injection are higher, life-span is long, the advantage that use cost is low, but and unexposedly prepares the concrete composition of nozzle alloy powder and prepare the method for alloy powder.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, a kind of cemented carbide powder producing nozzle and preparation method thereof is provided, the present invention has certain mitigation to world's cobalt and tungsten resource shortage, produce nozzle has light specific gravity, hardness is large, cost is low, the characteristic of safety and environmental protection, and bending strength conforms to quality requirements.
Object of the present invention is achieved through the following technical solutions: a kind of cemented carbide powder producing nozzle, and it is made up of the raw material of following weight portion:
WC 78～82，Ni 4～8，
TiC 8～12，Co 1～3，
Cr
2C
31～3，TaC 1～3。
Produce a preparation method for the cemented carbide powder of nozzle, it comprises the following steps:
S1. the raw material for standby of above-mentioned weight portion is taken respectively; Wherein, described WC is again fecula;
S2. the raw material taken in step S1 is added in ball mill, the alcohol adding 95 ~ 98% in ball mill is abrasive media, and the addition of alcohol and the weight ratio of raw material are 1:4 ~ 8, then to add weight be that the alloying pellet of raw material 3 ~ 4 times carries out ball milling, rotating speed is 45 ~ 55r/min, ball milling 45 ~ 52h;
S3. dried by the powder steam drying machine after ball milling, bake out temperature is 48 ~ 53 DEG C, and drying time is 1.8 ~ 2.3h, adds adhesive buna after oven dry, and wherein, adhesive buna is 1:48 ~ 55 with the weight ratio of oven dry powder;
S4. again dried with steam drying machine by the powder adding adhesive buna in step S3, bake out temperature is 98 ~ 105 DEG C, and drying time is 2.3 ~ 2.8h, crosses 70 ~ 90 mesh sieves after drying, obtained cemented carbide powder.
The present invention has the following advantages: WC of the present invention adopts the regenerative raw materials of industrial recovery, alloyed powder Ni substitutes a large amount of Co, effectively alleviate the shortage of world's cobalt and tungsten resource, decrease carbide alloy in use cobalt be likely oxidized to the virose Co of tool
6+to the threat of health; Compared with prior art, alloyed powder manufacture of the present invention alloy nozzle has light specific gravity, hardness is large, cost is low, the advantage of safety and environmental protection, and bending strength conforms to quality requirements.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described, and protection scope of the present invention is not limited to the following stated.
Embodiment 1: a kind of cemented carbide powder producing nozzle, it is made up of the raw material of following weight portion:
WC 78，Ni 4，
TiC 8，Co 1，
Cr
2C
31，TaC 1。
Produce a preparation method for the cemented carbide powder of nozzle, it comprises the following steps:
S1. the raw material for standby of above-mentioned weight portion is taken respectively; Wherein, described WC is again fecula;
S2. the raw material taken in step S1 is added in ball mill, the alcohol adding 95% in ball mill is abrasive media, and the addition of alcohol and the weight ratio of raw material are 1:4, then to add weight be that the alloying pellet of raw material 3 times carries out ball milling, rotating speed is 45r/min, ball milling 45h;
S3. dried by the powder steam drying machine after ball milling, bake out temperature is 48 DEG C, and drying time is 1.8h, adds adhesive buna after oven dry, and wherein, adhesive buna is 1:48 with the weight ratio of oven dry powder;
S4. again dried with steam drying machine by the powder adding adhesive buna in step S3, bake out temperature is 98 DEG C, and drying time is 2.3h, crosses 70 mesh sieves after drying, obtained cemented carbide powder.
Embodiment 2: a kind of cemented carbide powder producing nozzle, it is made up of the raw material of following weight portion:
WC 82，Ni 8，
TiC 12，Co 3，
Cr
2C
33，TaC 3。
Produce a preparation method for the cemented carbide powder of nozzle, it comprises the following steps:
S1. the raw material for standby of above-mentioned weight portion is taken respectively; Wherein, described WC is again fecula;
S2. the raw material taken in step S1 is added in ball mill, the alcohol adding 98% in ball mill is abrasive media, and the addition of alcohol and the weight ratio of raw material are 1:8, then to add weight be that the alloying pellet of raw material 4 times carries out ball milling, rotating speed is 55r/min, ball milling 52h;
S3. dried by the powder steam drying machine after ball milling, bake out temperature is 53 DEG C, and drying time is 2.3h, adds adhesive buna after oven dry, and wherein, adhesive buna is 1:55 with the weight ratio of oven dry powder;
S4. again dried with steam drying machine by the powder adding adhesive buna in step S3, bake out temperature is 105 DEG C, and drying time is 2.8h, crosses 90 mesh sieves after drying, obtained cemented carbide powder.
Embodiment 3: a kind of cemented carbide powder producing nozzle, it is made up of the raw material of following weight portion:
WC 80，Ni 6，
TiC 10，Co 2，
Cr
2C
31.5，TaC 2.5。
Produce a preparation method for the cemented carbide powder of nozzle, it comprises the following steps:
S1. the raw material for standby of above-mentioned weight portion is taken respectively; Wherein, described WC is again fecula;
S2. the raw material taken in step S1 is added in ball mill, the alcohol adding 97% in ball mill is abrasive media, and the addition of alcohol and the weight ratio of raw material are 1:6, then to add weight be that the alloying pellet of raw material 3.5 times carries out ball milling, rotating speed is 50r/min, ball milling 48h;
S3. dried by the powder steam drying machine after ball milling, bake out temperature is 50 DEG C, and drying time is 2h, adds adhesive buna after oven dry, and wherein, adhesive buna is 1:52 with the weight ratio of oven dry powder;
S4. again dried with steam drying machine by the powder adding adhesive buna in step S3, bake out temperature is 102 DEG C, and drying time is 2.4h, crosses 80 mesh sieves after drying, obtained cemented carbide powder.
Embodiment 4: a kind of cemented carbide powder producing nozzle, it is made up of the raw material of following weight portion:
WC 78，Ni 5，
TiC 8，Co 1.5，
Cr
2C
31，TaC 2。
Produce a preparation method for the cemented carbide powder of nozzle, it comprises the following steps:
S1. the raw material for standby of above-mentioned weight portion is taken respectively; Wherein, described WC is again fecula;
S2. the raw material taken in step S1 is added in ball mill, the alcohol adding 95% in ball mill is abrasive media, and the addition of alcohol and the weight ratio of raw material are 1:8, then to add weight be that the alloying pellet of raw material 3.2 times carries out ball milling, rotating speed is 55r/min, ball milling 48h;
S3. dried by the powder steam drying machine after ball milling, bake out temperature is 53 DEG C, and drying time is 1.8h, adds adhesive buna after oven dry, and wherein, adhesive buna is 1:53 with the weight ratio of oven dry powder;
S4. again dried with steam drying machine by the powder adding adhesive buna in step S3, bake out temperature is 105 DEG C, and drying time is 2.3h, crosses 90 mesh sieves after drying, obtained cemented carbide powder.
Further, in order to verify that scheme provided by the present invention can reach technique effect, nozzle prepared by the scheme provided embodiment 1,2,3 and 4 and nozzle performance prepared by ordinary rigid alloyed powder are tested, ordinary rigid alloyed powder composition is: WC:94%, Co:6%, specific experiment data are as shown in the table:
| Numbering | Hardness (HRA) | Density (g/cm 3） | Bending strength (N/mm 2） |
| Plain nozzle | 89.5 | 14.7 | 1600 |
| Embodiment 1 | 90.8 | 13.5 | 1550 |
| Embodiment 2 | 91.0 | 12.5 | 1600 |
| Embodiment 3 | 90.6 | 13.2 | 1560 |
| Embodiment 4 | 90.8 | 12.8 | 1580 |
As seen from the above table: the nozzle prepared with the cemented carbide powder that the inventive method provides is higher than the hardness number of plain nozzle, density value is low, bending strength numerical value difference is little, therefore, nozzle prepared by cemented carbide powder provided by the invention has lightweight, that hardness is large advantage, and bending strength conforms to quality requirements.
Claims (1)
1. produce a preparation method for the cemented carbide powder of nozzle, it is characterized in that, described cemented carbide powder is made up of the raw material of following weight portion:
WC 78～82， Ni 4～8，
TiC 8～12， Co 1～3，
Cr
2C
31～3， TaC 1～3；
Wherein, described WC is again fecula;
Preparation method comprises the following steps:
S1. the raw material for standby of above-mentioned weight portion is taken respectively;
S2. the raw material taken in step S1 is added in ball mill, the alcohol adding 95 ~ 98% in ball mill is abrasive media, the addition of alcohol and the weight ratio of raw material are 1:4 ~ 8, adding weight is again that the alloying pellet of raw material 3 ~ 4 times carries out ball milling, rotating speed is 45 ~ 55r/min, ball milling 45 ~ 52h;
S3. dried by the powder steam drying machine after ball milling, bake out temperature is 48 ~ 53 DEG C, and drying time is 1.8 ~ 2.3h, adds adhesive after oven dry, and adhesive is buna, and wherein, adhesive is 1:48 ~ 55 with the weight ratio of oven dry powder;
S4. again dried with steam drying machine by the powder adding adhesive in step S3, bake out temperature is 98 ~ 105 DEG C, and drying time is 2.3 ~ 2.8h, crosses 70 ~ 90 mesh sieves after drying, obtained cemented carbide powder.
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| CN104372227A (en) * | 2014-10-14 | 2015-02-25 | 遵义中铂硬质合金有限责任公司 | Hard alloy for hot-working die and production method thereof |
| CN105714170B (en) * | 2014-12-03 | 2017-12-05 | 自贡硬质合金有限责任公司 | Hard alloy and preparation method thereof |
| CN104942298A (en) * | 2015-05-25 | 2015-09-30 | 上海高更高实业有限公司 | Composite cemented carbide spherical gear or pillar stud of inhomogeneous composition and structure and manufacturing method thereof |
| CN106238224B (en) * | 2016-09-07 | 2017-09-26 | 洛阳豫鹭矿业有限责任公司 | A kind of nozzle for mineral floating equipment |
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| CN1211284A (en) * | 1996-12-16 | 1999-03-17 | 住友电气工业株式会社 | Cemented carbide, process for production thereof, and cemented carbide tools |
| CN101265544A (en) * | 2008-05-07 | 2008-09-17 | 株洲精工硬质合金有限公司 | Vanadium-containing non-magnesium hard alloy and preparation method thereof |
| CN101829781A (en) * | 2010-05-26 | 2010-09-15 | 四川大学 | Method for connecting hard alloy of inactive intermediate layer and steel |
| CN102296223A (en) * | 2011-08-15 | 2011-12-28 | 四川欧曼机械有限公司 | Fine grain WC-based cemented carbide material and its preparation method |
| CN102443727A (en) * | 2010-10-09 | 2012-05-09 | 成都名钨科技有限责任公司 | Ni substituting Co hard alloy wearable part and preparation method thereof |
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2013
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Patent Citations (6)
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| CN1211284A (en) * | 1996-12-16 | 1999-03-17 | 住友电气工业株式会社 | Cemented carbide, process for production thereof, and cemented carbide tools |
| CN101265544A (en) * | 2008-05-07 | 2008-09-17 | 株洲精工硬质合金有限公司 | Vanadium-containing non-magnesium hard alloy and preparation method thereof |
| CN101829781A (en) * | 2010-05-26 | 2010-09-15 | 四川大学 | Method for connecting hard alloy of inactive intermediate layer and steel |
| CN102443727A (en) * | 2010-10-09 | 2012-05-09 | 成都名钨科技有限责任公司 | Ni substituting Co hard alloy wearable part and preparation method thereof |
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